Haskell Cookbook

How to do it...

1. Create a new project working-with-vector with the simple Stack template:

        stack new working-with-vector simple

2. Add the dependency on the vector package in the build-depends subsection of the executable section:

        executable working-with-vector
          hs-source-dirs:      src
          main-is:             Main.hs
          default-language:    Haskell2010
          build-depends:       base >= 4.7 && < 5
                       , vector

3. Open src/Main.hs and start coding there. We will experiment with vector in this file:

        module Main where

4. Import both immutable and mutable vector modules:

        import qualified Data.Vector as V
        import qualified Data.Vector.Mutable as MV
        import Data.Vector ((//),(!),(!?))

5. We will use smaller functions to demonstrate the vector and its abilities.
6. Construction: We can construct ...